Missouri's Gateway Arch among world's 2014 endangered landmarks

The Gateway Arch in Missouri has been placed on the 2014 World Monuments Watch list. (planet5D LLC/shutterstock.com)

An international heritage group has placed 67 sites, monuments and landmarks on its 2014 World Monuments Watch list this year -- a list that includes the cultural heritage of the entire country of Syria.

According to the World Monuments Fund's latest report released this week, conflict and escalating violence in war-torn Syria are jeopardizing the very existence of the country's cultural heritage, a finding that has prompted researchers to place the entire nation on its 2014 World Monuments Watch list.

Here's the complete list of sites, cities and monuments deemed to be at risk from conflict and catastrophe, lack of resources, development pressures and loss of cultural traditions.

Argentina
Church and Monastery of St. Catherine of Siena, Buenos Aires

United States of America
Chinati Foundation, Marfa, Texas
George Nakashima House, Studio, and Workshop, Bucks County, Pennsylvania
Henry Klumb House, San Juan, Puerto Rico
Jefferson National Expansion Memorial, St. Louis, Missouri
Taliesin, Spring Green, Wisconsin
The Cloisters and Palisades, New York and New Jersey